<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        h1{
            font-family: "楷体";
            font-size: 18px;
            font-weight: 900;
            font-style:normal;
            /* font: italic 900 18px "楷体"; */
        }
        .d1{
            background-color: rgb(207, 18, 18);
            height: 100px; /*高度*/
            line-height: 100px;
            /* text-align: center; */
            color: white;/*字体颜色*/
            text-decoration: underline overline;/*上划线 下划线*/
            padding-left: 10px;
        }
    </style>
</head>
<body>
    <h1>天气不错 I am a student</h1>
    <div class="d1">???</div>
</body>
</html>